Probability, Part 5 of 5

[FestIf0012]

dude thanks so much pasted my test because of this (Y)

[stretchingmonsters]

your awesome thanks

[girl9656]

This has really helped me... Thank you :))

[krmarine]

I like visual aids and these examples help. I guess this is as simple as probability can get. It's very difficult concept to quickly decided which among ALL of the possiblities to do. Taking the GRE I have to make a choice and do the problem in 90 seconds. So, trying to find the most easy format/pattern for this.